Strongly asymmetric waveguide laser diodes for high brightness picosecond optical pulses generation by gain switching at GHz repetition rates

E. A. Avrutin*, B. S. Ryvkin, J. T. Kostamovaara, D. V. Kuksenkov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Rate equations analysis, supported by travelling wave simulations, is used to show that a diode laser design with a very low (<1%) confinement factor is optimal for generating streams of high energy optical pulses for nonlinear applications by large-signal modulation with both existing and potentially improved ac current generators. An asymmetric waveguide laser design is proposed to realize this low confinement factor while simultaneously maintaining good beam properties in a single transverse mode. The rate equations model complemented by transport equations is used to quantify the effects of transport in the broad optical confinement layer(s) on the laser dynamics, and it is shown that in the proposed laser construction the detrimental effects of transport are weak.

Original languageEnglish
Article number055006
JournalSemiconductor science and technology
Issue number5
Publication statusPublished - 1 May 2015


  • gain switching
  • large signal modulation
  • semiconductor lasers

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